Check this one out ...
Link To It Here ...
... this one says it's 620 games, however, it's really about 150 (different version of the same games)

You can look at, and mouse-over, the game list
HERE ...
The first one I was speaking of ...

... this one is interesting in that it only holds 4 games each at $50/pop ...
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The black model comes with:
Sonic the Hedgehog
Puyo Puyo 2
Out Run
Royal Stone
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The blue variant includes:
Sonic Chaos
Gunstar Heroes
Sylvan Tale
Baku Baku Animal
:format(webp):no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/20015801/img_yellow.png)
The yellow Game Gear Micro has:
Shining Force Gaiden: Ensei – Jashin no Kuni he
Shining Force: The Sword of Hajya
Shining Force Gaiden: Final Conflict
Nazopuyo Aruru no Ru
:format(webp):no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/20015809/img_red.png)
And the red version is preloaded with:
Revelations: The Demon Slayer
Megami Tensei Gaiden: Last Bible Special
The GG Shinobi
Columns
I'm not these games are worth a fuck; it's just a neat little toy ...